Fual costs

[Vincenzo]

Greetings

I have a manual AU 111 XR6 that I will be starting a build thread on in the next few days. Prior to that though I have been experimenting with fuel and it's effect on mileage. I usually have to put in about 60 litres

Here in Darwin we pay $1.50/litre for 91 ron unleaded
(this gives me 450km around town and 550km on a trip)

We pay $1.60/litre for 95 ron -
(this gives me 500km around town and 610km on a trip)

$1.62/litre for 98 ron with 10% ethanol and
(this gives me 580km around town [60 litres] and 710km [61 litres] on a trip)

we pay $1.82 for BP Ultimate 98 Ron - no test drive yet

As a pensioner I can justify an extra $6 per tank for better milage but an extra $18 per tank I would need to get at least 810km to 820km on a trip and about 660km to 680 km around town.

We don't have the weekly swings in price you get down south so shopping around is out of the question so what is the consensus - would the above mileage seem do-able


Cheers and thanks for reading


Vincenzo